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sprinkles08
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 21606
Experience:  Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist
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2003 jeep liberty random misfire shut off crank up runs fine

Customer Question

2003 jeep liberty random misfire shut off crank up runs fine for awhile
Submitted: 1 year ago.
Category: Jeep
Expert:  sprinkles08 replied 1 year ago.
Hello and welcome to JustAnswer!
There are quite a few things that can cause the engine to run poorly and die. I'm assuming that it runs fine in between these times.
The most likely cause for intermittent dying would be a failing crank sensor but it could also be the cam sensor, powertrain control module, or it could be losing fuel pressure.
The first step in diagnosing the problem will be to check for fault codes. Most issues that will cause a loss of spark will set a fault code, if a code is set it will give you a starting point for diagnosis.